#!/bin/sh
# Tcl ignores the next line -*- tcl -*- \
exec tclsh "$0" -- "$@"

# This is a really stupid program, which serves as an alternative to
# msgfmt.  It _only_ translates to Tcl mode, does _not_ validate the
# input, and does _not_ output any statistics.

proc u2a {s} {
        set res ""
        foreach i [split $s ""] {
                scan $i %c c
                if {$c<128} {
                        # escape '[', '\' and ']'
                        if {$c == 0x5b || $c == 0x5d} {
                                append res "\\"
                        }
                        append res $i
                } else {
                        append res \\u[format %04.4x $c]
                }
        }
        return $res
}

set output_directory "."
set lang "dummy"
set files [list]

# parse options
for {set i 1} {$i < $argc} {incr i} {
        set arg [lindex $argv $i]
        if {$arg == "--statistics" || $arg == "--tcl"} {
                continue
        }
        if {$arg == "-l"} {
                incr i
                set lang [lindex $argv $i]
                continue
        }
        if {$arg == "-d"} {
                incr i
                set tmp [lindex $argv $i]
                regsub "\[^/\]$" $tmp "&/" output_directory
                continue
        }
        lappend files $arg
}

proc flush_msg {} {
        global msgid msgstr mode lang out fuzzy

        if {![info exists msgid] || $mode == ""} {
                return
        }
        set mode ""
        if {$fuzzy == 1} {
                set fuzzy 0
                return
        }

        if {$msgid == ""} {
                set prefix "set ::msgcat::header"
        } else {
                if {$msgstr == ""} {
                        return
                }
                set prefix "::msgcat::mcset $lang \"[u2a $msgid]\""
        }

        puts $out "$prefix \"[u2a $msgstr]\""
}

set fuzzy 0
foreach file $files {
        regsub "^.*/\(\[^/\]*\)\.po$" $file "$output_directory\\1.msg" outfile
        set in [open $file "r"]
        fconfigure $in -encoding utf-8
        set out [open $outfile "w"]

        set mode ""
        while {[gets $in line] >= 0} {
                if {[regexp "^#" $line]} {
                        if {[regexp ", fuzzy" $line]} {
                                set fuzzy 1
                        } else {
                                flush_msg
                        }
                        continue
                } elseif {[regexp "^msgid \"(.*)\"$" $line dummy match]} {
                        flush_msg
                        set msgid $match
                        set mode "msgid"
                } elseif {[regexp "^msgstr \"(.*)\"$" $line dummy match]} {
                        set msgstr $match
                        set mode "msgstr"
                } elseif {$line == ""} {
                        flush_msg
                } elseif {[regexp "^\"(.*)\"$" $line dummy match]} {
                        if {$mode == "msgid"} {
                                append msgid $match
                        } elseif {$mode == "msgstr"} {
                                append msgstr $match
                        } else {
                                puts stderr "I do not know what to do: $match"
                        }
                } else {
                        puts stderr "Cannot handle $line"
                }
        }
        flush_msg
        close $in
        close $out
}